深层搅拌桩复合地基沉降可靠性分析  

An reliability analysis of settlement on deep-mixing pile composite foundation

作　　者：杜海金[1] 宋连河[1] 刘远鹏[1] 李军[1] 

机构地区：[1]河北工程大学土木学院,河北邯郸056038

出　　处：《河北建筑科技学院学报》2006年第2期4-7,共4页Journal of Hebei Institute of Architectural Science & Technology

摘　　要：在深层搅拌桩复合地基传统沉降分析的基础上,考虑影响复合地基沉降的众多不确定性因素,建立了复合地基沉降可靠度分析模型;将任意分布的随机变量映射为标准正态随机变量,从正态空间中可靠度指标的几何意义出发,建立了可靠度指标求解的优化模型,并利用Matlab优化工具箱的优化功能求解,得到可靠度指标及验算点坐标;结合具体工程实例分析了各随机变量的变异性对复合地基沉降可靠度的影响。Considering many uncertain factors that affect settlement of composite foundation, this paper had put forward settlement reliability analysis model of composite based on classical settlement analysis of deep - mixing pile composite foundation. Random distribution stochastic variable is mapped to stochastic variable with standard normal distribution. Optimization model for solving engineering structures reliability index is founded based on reliability index geometry significance in the normal space. Matlab＇ s optimization toolbox is used, the reliability index and checking point had been gained together. The influence to settlement reliability of composite foundation caused by changeability of every stochastic variable is analyzed in the end.

关 键 词：复合地基 深层搅拌桩 沉降计算 可靠度 MATLAB优化工具箱 

分 类 号：TU473[建筑科学—结构工程]